초록 ▼

The invention relates to a tool steel intended for cold working operations and having very high impact strength and good resistance to wear, said steel being made powder-metallurgically by consolidation of metal powder to a dense body. The steel has the following chemical composition expessed in wei

The invention relates to a tool steel intended for cold working operations and having very high impact strength and good resistance to wear, said steel being made powder-metallurgically by consolidation of metal powder to a dense body. The steel has the following chemical composition expessed in weight-% 1-2.5% C, 0.1-2% Si, max 0.3% N, 0.1-2% Mn, 6.5-11% Cr, max 4% Mo, max 1% W and 3-7% V, wherein up to half the amount of vanadium can be replaced by 1.5 times as much niobium, and wherein the ratio V/C shall amount to between 2.5 and 3.7, balance essentially only iron and impurities and accessory elements in normal amounts.

대표청구항 ▼

A tool steel intended for cold working operations and having very high impact strength and good resistance to wear, said steel being made powder-metallurgically by consolidation of metal powder to a dense body, characterized in that it has the following chemical composition expressed in weight-% 1-2

A tool steel intended for cold working operations and having very high impact strength and good resistance to wear, said steel being made powder-metallurgically by consolidation of metal powder to a dense body, characterized in that it has the following chemical composition expressed in weight-% 1-2.5% C, 0.1-2% Si, max 0.3% N, 0.1-2% Mn, 6.5-11% Cr, max 4% Mo, max 1% W and 3-7% V, wherein up to half the amount of vanadium can be replaced by 1.5 times as much niobium, the maximum V/C ratio being 3.7, and the ratio V/Mo being at least 2.6, the balance being essentially only iron and impurities and accessory elements in normal amounts.